Valve for air-compressors.



No. 883,928.. PATENTED APR. 7, 1908.

r Y A. F. BATGHELDER.

VALVE FOR AIR GOMPRESSORS.

APPLICATION FILED OCT. 29, 1900.

Wfcnesses. I Inventor.

I flsa Batchelder". z' z UNITED STATES PATENT OFFIEE.

COMPANY, A CORPORATION OF NEW .YORK.

TTALVIE FOR AIR-GOMPRESSORS.

- Specification of Letters Patent.

Patented April 7, 1908.

Application filed October 29, 1900. Serial No. 34,708.

and it consists in a valve for contro ling the inlet and the outlet tothe compression cylinder.

The especial features of this valve which render it novel and useful arehereinafter full set forth and particularly pointed out in t e claims.

The object of the construction is to render the valve noiseless, andcause it to wear evenly and keep the meeting surfaces clean;

furthermore, to afford the largest circumferential opening possible in aiven area, thereby insuring a minimum 'ft of the valve; also, to makethe valve as light as possible in order to insure prompt action and areduction of vibration and noise.

In the accompanying drawing, Figure 1 represents a vertical axialsection of a casing fragment containing a valve constructed inaccordance with the present invention; Fig: 2 is a view of the valveproper; Fig. 3 is a plan view thereof; Fig. 4 is acentral axial sectionof the valve; l ig. 5 is ahalf sectional elevation of a casingcontaining a plurality of valves; Fig. 6 is a to plan view of the same;and Fig. 7 l is a bottom plan view thereof.

In Fig. 1 I have shown one of my improved valves in'position in thecasing or head O of an air compressor. In said head C is arranged the o'ening c throu h which the air enters the oy 'nder if the va ve is usedas an inlet valve, or through which itleaves the cylinder if the valveis employed as an outlet valve, the particular arrangement of partsillustrated being that for adapting the valve for use as an outletvalve.

'The valve I consists of a fiat disk, shown in the drawings asimperforate, which is countersunk or dished upon the upper and undersides for the sake of lightness. side there is left a narrow annular ribi, which constitutes the face of the valve. The thickened edge of thevalve is provided with radial notchesi, leaving between them radialwings c projecting beyond the annular face t.

On the under As shown in Fig. 1, the valve stepson the annular face andseat when shut, and on-tlie wing guides i against the valve kee er whenopen. The wing guides '17 project a ove the diskon, the side oppositethe valve seat, thus enabling the'air which has passed between the valveand its seat, and through the open- 'ings between the wing guides '5 tocontinue its course between the disk and the valve keeper. All the edgesover which the air has to pass, except thoseof the valve seat, arerounded, thus forming a path of low resistance for. the air, andpreventing whistling. The edges of the notches i are inclined to theaxis of the disk circumferentially of the disk and in the same generaldirection relative to the periphery of the disk so that one edge of eachwing is undercut, and the opposite edge is beveled, as clearly appearsfrom an inspection of Figs. 2, 3 and 4. The edge of the disk between thewings is rounded off, as indicated by the dotted lines. in. Fig. i. Thevalve can be operated either vertically with either side up, orhorizontally, as convenient in any particular case. This valve is re'ceived in a bushing K, which is fitted into The bushing contains anarrow annular seat k, upon which the annular face 'i of the valveseats. The bushing is slightly larger in diameter than the valve, sothat the latter can lay loosely and freely within the bushing, lieingguided therein in its vertical movements by the edges of the Wings '5which engage with and are guided by the inner walls of the bushing. Theinner diameter of the bushing is but very slightly largerv than thevalve, and the Wing guides i engage the walls of the bushing, so that ifone side of the valve sticks, the other side can move without jammingthe valve in the chamber. Ample area of air passage is provided betweenthawing guides i and the edges of the disk and the walls of the bushing.The valve is retained within the bushing by a keeper L, which has 10 theform ofa bushing'or gland and is screwed into. a screw-threadedenlargement of the upper part of the opening 0 in the headof thecylinder. The keeper is provided with a downwardly-projecting flange Zwhich 'ter- 105 a whistling noise is avoided.

.It will. be seen that a valve constrncted as above does? l hasa maximumcircumferential opening for a given area. This results in a i'ninimumlift of the valve, and this being the condition, which for any giventime of action means .a minimum velocity of the from anyoily germprovide valve when'mmotion, it follows that a com- -parat1vely noiselessvalve action is secured.

urthermore, the lightness of the valve insures a reduction of theinertia of the moving parts, which eliects a reduction in the effort andthetime in which the valve is started from a state of rest, and alsoresults in a reduction of the noise and vibration with which it isstopped'at either end of its stroke. Furthermore the raised annularvalveseat and valve-face are especially convenient for grinding, andbeing) fiat, permit a limited amount of side play y the valve on thevalve .seat, which tends to keep the parts absolutely 'air-tigl1t andeffects. a constant removal of dust or-other foreign substances fromsaid; .eurfaces.

This construction also permitsfthe interchange of valves.

Furthermore, the

ressure of the air passing by the inclined aces of the wings produces aslight partial rotation-of. the valve on its seat at each lift, whichresults in an even wear of the valveface andseat. and .tends to keep thearts clean and tight." Since the wing gui es i will-bezeventually rubbedover the entire inner wall-of the valve chamber, and alsoover-theexpos'ed surface of the valve keeper, these parts also .will bekept clean and free which would otherwise be de 'osited on em.

alves of the above described construction'are well adapted for use inapparatus-not specially designed for them as shown herein.

In Figs. 5, 6 and 7, I have shown a'modi- :fi'cation in which a casing Mis provided con-' taining a plurality of air passages each surroundedbyan annular seat m. The valvekeeper M -is secured on the end of thecasino M by dowels N or otherwise, and is provide with a lurality'ofopenings m preferably d with rounded or beveled edges and registeringwith theair passages in the casing M. The edge of the valve-keeper M isscrew-threaded.- and' flush with the outer surface of the casing M, sothat the casing and keeper can be screwed into a suitably tapped openingin the head of the cylinder of an aircompressor. The valve keeper Mforms the endgof the valve chamber. nearest. the cylinder-,and 'formsthe surface on which the wing guideswi? of the valves, "strike to stopthe valves when they are moved from their Each chamber in the casingbetweenwith t ose of the casing a p the openingsm andm is provided witha small. disk-valve of the construction hereinbetore described. Theadvantage oi using a plurality of valvesis that, while they apparvalvesinthe chambers betweenthe holes m and m, and finally through the holesat. What I claim as new and desire to secure by Letters Patent of theUnited States is:

l. A valve for air-compressors, consisting of a disk having countersunkupper and lower sides, a narrow annular face on one side, andradialwings on the other side, one edge of said wings being undercut andthe other edge having a bevel.

2. A valve for air-compressors consisting of a disk having countersunkupper and lower sides, a narrow annular face on one side, and

radial wings on the other side having their edges inclined to the axisof the disk, the edge of the disk between the wings being rounded.

3. Avalve-casing for air-compressors, containing a plurality of airpassages,'a valvekeeper secured upon said casing and having a corresonding number of assages forming lurality of chambers, and a disk-valvein each chamber having a'narrow annular face on one side and a series ofradial wings on the other side provided with inclined edges. 4. A valvefor air-compressors, consisting of an im erforate disk havin a(projecting annular -ace on one side and ra ial'wings projecting beyondthe edge of the disk, one edge of each win being undercut and the other"edge beveled. j

5. A valve casing for air-compressors, containing a plurality of airpassages, a valve keeper secured upon said casing and having a pluralityof passages registering with those in the casing, and a plurality of dsk valves controlling said passages, each having an annular face on oneside, and a series of radial wings with inclined edges,

6. A valve which comprises a disk having an annular rib on one surface,and on the other laterally projecting win guides includ ing intermediatepassages etween them, said wing guides having their edges inclined tothe axis of the disk .in the same general direction relative to itsperiphery for the purpose of effecting a partial rotation of said diskwhen it is operated. a

7. The combination with a valve seat having anend diaphragm having oneor more openings, of a valve kee er having corresponding openings, and cambers between the diaphragm and keeper.

8. The combination with a valve casing having valve chambers formed withraised seats, of disk valves in the chambers, said valves having ribsengaging the raised seats, and having also laterally projecting wingguides engaging the walls of the chambers, said wing guides having theiredges inclined to the axis of the disk in the same eneral directionrelative to its periphery for t e purpose of producing a partialrotation of said valves whenthey are raised from their seats as the airflows through said casing.

9. A valve for air compressors consistin of a disk having countersunkupper an lower sides and a narrow annular faceon one side and radialwings on the other side, a corresponding edge of each of said wingsbeing inclined to the axis of the disk.

10. A valve for air com ressors consisting of a disk having an annu arrib on one side and on the other side laterally-projecting wingsincluding intermediate passages beisk valves in the tween them, a corresonding edge of each of said wings being inc ined to the axis of thedisk.

11. The combination with a valve ,casing havin a plurality of shallowvalve chambers, of a dlsk valve having a narrow annul 'ar rib on oneside and a series of inclinedgi'adial wings on the other side arrangedwithin and free y movable within the limits of each .of said chambers.

12. The combination with a valve casing having a plurality of shallowvalve chambers, of disk valves having a narrow annular rib on one sideand on the other side a series of radial wings, a corresponding edge ofeach ,of which is under-cut, said valves being ar ranged within andfreely movable within the limits of each of said chambers.

' In witness whereof I have hereunto set my hand this 27th day ofOctober, 1900.

ASA Fl BATCHELDER.

Witnesses:

BENJAMIN B. HULL, MARGARET E. WOOLLEY.

